diff --git a/vtm/src/org/oscim/renderer/GLShader.java b/vtm/src/org/oscim/renderer/GLShader.java
index 61e06cf8..13c2aefe 100644
--- a/vtm/src/org/oscim/renderer/GLShader.java
+++ b/vtm/src/org/oscim/renderer/GLShader.java
@@ -11,7 +11,7 @@ import org.slf4j.LoggerFactory;
 public abstract class GLShader {
 	final static Logger log = LoggerFactory.getLogger(GLShader.class);
 
-	static GL20 GL;
+	private static GL20 GL;
 
 	public int program;
 
@@ -123,7 +123,7 @@ public abstract class GLShader {
 		return program;
 	}
 
-	public static class SimpleShader {
-
+	public static void init(GL20 gl20) {
+		GL = gl20;
 	}
 }
diff --git a/vtm/src/org/oscim/renderer/MapRenderer.java b/vtm/src/org/oscim/renderer/MapRenderer.java
index 6006a58c..0b38a18d 100644
--- a/vtm/src/org/oscim/renderer/MapRenderer.java
+++ b/vtm/src/org/oscim/renderer/MapRenderer.java
@@ -319,7 +319,7 @@ public class MapRenderer {
 
 		GLState.init(GL);
 		GLUtils.init(GL);
-		GLShader.GL = GL;
+		GLShader.init(GL);
 
 		// Set up some vertex buffer objects
 		BufferObject.init(GL, 200);